/**
* @param \XLite\Module\CDev\Coupons\Model\Coupon $coupon Coupon
* @param \XLite\Model\Order $cart Cart
*
* @return string
*/
protected function checkCompatibility($coupon, $cart)
{
$error = '';
try {
$coupon->checkCompatibility($cart) && $coupon->checkUnique($cart);
} catch (\XLite\Module\CDev\Coupons\Core\CompatibilityException $exception) {
$error = static::t($exception->getMessage(), $exception->getParams());
}
return $error;
}